Curvilinear fiber optimization tools for aeroelastic design of composite wings

Abstract The aeroelastic design of composite wings modeled as thin-walled beams is investigated through the use of curvilinear fiber. The structural model considers non-classical effects such as transverse shear, warping restraint, rotary inertia, nonuniform torsional model and also aerodynamic loads based on Wagner's function. In this paper, a linear spanwise variation of the fiber orientation resulting in a variable-stiffness structure is used to optimize the wing for maximum aeroelastic instability speed purpose, while manufacturing constraints are incorporated. Numerical results indicate improvements of aeroelastic stability of variable-stiffness wings over conventional, constant-stiffness ones.

[1]  Hassan Haddadpour,et al.  Aeroelastic instability of aircraft composite wings in an incompressible flow , 2008 .

[2]  Bernhard Stahl,et al.  A strip method for prediction of damping in subsonic wind tunnel andflight flutter tests. , 1969 .

[3]  Dewey H. Hodges,et al.  Nonclassical Behavior of Thin-Walled Composite Beams with Closed Cross Sections , 1990 .

[4]  L. Meirovitch.  Analytical Methods in Vibrations , 1967 .

[5]  Z. Gürdal,et al.  Design of variable-stiffness conical shells for maximum fundamental eigenfrequency , 2008 .

[6]  Liviu Librescu,et al.  Aeroelastic instability of aircraft wings modelled as anisotropic composite thin-walled beams in incompressible flow , 2003 .

[7]  Anthony N. Palazotto,et al.  Vibration and buckling characteristics of composite cylindrical panels incorporating the effects of a higher order shear theory , 1991 .

[8]  Hassan Haddadpour,et al.  Nonlinear aeroelastic response of slender wings based on Wagner function , 2008 .

[9]  Earl H. Dowell,et al.  Effects of geometric structural nonlinearity on flutter and limit cycle oscillations of high-aspect-ratio wings , 2004 .

[10]  Zafer Gürdal,et al.  Buckling response of laminates with spatially varying fiber orientations , 1993 .

[11]  Hassan Haddadpour,et al.  Curvilinear fiber optimization tools for design thin walled beams , 2011 .

[12]  Brian Tatting,et al.  Tow-Placement Technology and Fabrication Issues for Laminated Composite Structures , 2005 .

[13]  Ohseop Song,et al.  Modeling and response analysis of thin-walled beam structures constructed of advanced composite materials , 1990 .

[14]  Z. Gürdal,et al.  Variable-stiffness composite panels: Buckling and first-ply failure improvements over straight-fibre laminates , 2008 .

[15]  Zhanming Qin,et al.  Vibration and Aeroelasticity of Advanced Aircraft Wings Modeled as Thin-Walled Beams -Dynamics, Stability and Control , 2001 .

[16]  E Carson Yates.  Calculation of flutter characteristics for finite-span swept or unswept wings at subsonic and supersonic speeds by a modified strip analysis , 1958 .

[17]  L. Librescu,et al.  Thin-Walled Composite Beams: Theory and Application , 2006 .

[18]  Giuseppe Quaranta,et al.  Aircraft T-tail flutter predictions using computational fluid dynamics , 2011 .

[19]  Vahid Esfahanian,et al.  Unsteady supersonic aerodynamics based on BEM, including thickness effects in aeroelastic analysis , 2004 .

[20]  J. Peiro,et al.  Camber effects in the dynamic aeroelasticity of compliant airfoils , 2009 .

[21]  Ohseop Song,et al.  Behavior of Thin-Walled Beams Made of Advanced Composite Materials and Incorporating Non-Classical Effects , 1991 .

[22]  Dawn C. Jegley,et al.  Optimization of Elastically Tailored Tow-Placed Plates with Holes , 2003 .

[23]  Nikolay Banichuk,et al.  Static instability analysis for travelling membranes and plates interacting with axially moving ideal fluid , 2010 .

[24]  Z. Gürdal,et al.  In-plane response of laminates with spatially varying fiber orientations - Variable stiffness concept , 1993 .